Bar and shafting turning machine



(N0 Model.) 2 SheetsSheet 1. J. PITZ. BAR AND SHAFTING TURNING MACHINE.

No. 584,213. Patented June 8,1897.

5 ATTORNEYS mums Farms co. PMOYO-LITHO. wnsamcmn n c (No Model.) 2SheetsSheet 2. J. FITZ. BAR AND SHAFTING TURNING MACHINE.

Patented June 8,1897.

A TTURNEYS.

UNITED STATES PATENT Grinch.

JACOB FITZ, OF HANOVER, PENNSYLVANIA.

BAR AND SHAFTING TURNING MACHINE.

SPECIFICATION forming part of Letters Patent No. 584,213, dated June 8,1897.

Application filed J l 23, 1896.-

To all whom it may concern:

Be it known that l, JACOB FITZ, of Hanover, in the county of York andState of Pennsylvania, have invented a new and useful Improvement in Barand Shafting Machines, of which the following is a specification.

My invention is an improvement in machines for turning bars and shafting, and has for an object to provide simple means by which to accuratelyturn the bar or shaft; and the invention consists in certain novelconstructions, combinations, and arrangements of parts, as will behereinafter described, and pointed out in the claims.

In the drawings, Figure l is a top plan View of my machine. Fig. 2 is avertical longitudinal section thereof on about line 2 2, Fig. 1. Fig. 3is a cross-section on about line 3 3 of Fig. 2. Fig. 4 is across-section on about line 4 i of Fig. 1. Fig. 5 is a face view of thecutter-head with the tool-clamping ring and the adjusting-band removed,and Fig. 6 is a detail view of the eccentric lever.

The main frame comprises a suitable stand having shears or ways A uponwhich certain of the parts are supported and slide, as presenilydescribed.

The carrier or carriers 13, of which I preferably employ two, aresupported on the ways A, as shown in Figs. 1, 2, and 4, and may slidealong said ways, as will be best understood from Fig. 4. I make thecarrier with the seat 0 for the rod or shaft D to be turned and providea clamping-cap E, hinged at e and provided with a clam ping-bolt E, sothe rod or shaft can be held firmly in the seat 0, and thus be fed intocontact with and past the cutting devices or tools by the movement ofthe carrier.

In operating the carrier along the ways A, I provide a feed-screw F,turn ed by suitable gearing at f. This screw is engaged by the sectionsof a split nut G on the carrier B, which sections may be adjusted by theeccentric lever G into and out of hearing or mesh with the feed-screw,so the carrier may be quickly thrown into or out of operation, as may bedesired. It is preferred to employ two carriers and to arrange them onopposite sides of the turning head, as shown in Figs.

1 and 2, so one carrier may be used to push Serial No. 600,228. (Nomodel.)

the bar or shaft as far as possible through the turning head, when suchcarrier may be freed from both the bar and the feed-screw and the othercarrier be clamped to the bar and engaged with'the feed-screw, so it mayoperate to draw the bar entirely through and free of the turningdevices. These carriers 13 are alike, so the description of one willanswer for both.

The head H may be arranged to turn, as shown in the accompanyingdrawings, or may be used stationary and put on the ordinarylathe-carriage, in which case the shaft might be on centers and beturned in the usual or other desired manner. The head is provided withthe body I, having a tubular stem 2", which fits and turns in thebearings j of the stands J, such stands also having bearings j for theback shaft J, which is geared at J with the tubular stem of the body I,to properly turn the head when the back shaft is operated, which may beaccomplished by any desired connection with the power. The tubular stomais geared at f with the feed-screw F, so the latter is operated as theturning head is revolved. To the body I is held the face-plate K, havinga threaded seat 70 near its outer edge, and to this face-plate is heldthe tool-holder L, having ways L for the tools M. At their outer endsthe tools M are pressed upon by individual blocks N, the outer ends ofwhich are beveled at n and are pressed upon by the adjusting-band 0,whose inner edge is beveled at O to bear upon the blocks N, while itsouter edge is threaded and turns into the threaded seat of thefaceplate, so the adjusting-band as it is turned into the face-platewill force the tools into the desired position. When the tools have beenadjusted as desired, they may be held by the clamping-ring P, whichbears against the tools and is bolted to the tool-holder L or isotherwise securely held. The tools M may be of any suitable turningpattern and will, as the head is revolved, operate to turn the bar orshaft to the desired form, the bar being carried through thecutting-head by the feeding-carriers before described.

At the ends of the tubular stem I provide removable bushings Q, held bykeys or pins q. These bushings turn with the stem and the tools, thetools and their inclined blocks,

the adjusting-band having an inner beveled edge engaging the tool-blocksand a threaded portion entering the threaded seat of the faceplate, andthe toolclamping ring bearing against the tools and suitably held,substan: tially as shown and described.

2. The improved machine herein described consisting of the tubular stemhavingaface plate, the tools held to and movable in and out on saidface-plate, the tool-blocks one for each of said tools, theadjusting-band engaging said blocks, a beveled surface being pro--'vided whereby the band may force the blocks inward and so adjust thetools correspondingly, the carriers on opposite sides of said stem andprovided with means for clamping the shaft, the feed-screw and meanswhereby the carriers maybe engaged with or freed from the feed-screwsubstantially as shown and described.

JACOB FITZ.

WVitnesses:

II. W. BEAN, M. H. WArsoN.

